package sa.com.sure.ejtimaa.database;

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import android.content.Context;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteException;
import android.database.sqlite.SQLiteOpenHelper;

public class DataBaseHelper extends SQLiteOpenHelper {

	// All Static variables 
    // Database Version 
	public static final int DATABASE_VERSION = 1; 
	
	private static String DATABASE_PATH = "/data/data/sa.com.sure.ejtimaa/databases/";
	
 // Database Name 
    public static final String DATABASE_NAME = "sa.com.sure.ejtimaa";

    public SQLiteDatabase db;
    
    
    private final Context _Context;
    
    public DataBaseHelper(Context context) { 
        super(context, DATABASE_NAME, null, DATABASE_VERSION);
        this._Context = context;
    }


	@Override
	public void onCreate(SQLiteDatabase db) {
		
		// db.execSQL(sa.database.NewsDataSource.CreateTable); 
	}
	
	@Override
	public synchronized void close() {
 
    	    if(db != null)
    		    db.close(); 
    	    super.close();
	}


	@Override
	public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
		
        // Drop older table if existed 
        //db.execSQL(sa.database.NewsDataSource.DropTable); 
  
        // Create tables again 
        onCreate(db); 
	}
    
	
	public void createDataBase(){
		 
    	boolean dbExist = checkDataBase();
 
    	if(dbExist){
    		//do nothing - database already exist
    	}else{
 
    		//By calling this method and empty database will be created into the default system path
            //of your application so we are gonna be able to overwrite that database with our database.
        	this.getReadableDatabase();
 
        	try {
 
    			copyDataBase();
    		} 
        	catch (IOException e) {
 
        		throw new Error("Error copying database");
 
        	}
    	}
 
    }
	
	private boolean checkDataBase(){
		 
    	SQLiteDatabase checkDB = null;
 
    	try{
    		String myPath = DATABASE_PATH + DATABASE_NAME;
    		checkDB = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY);
 
    	}catch(SQLiteException e){
 
    		//database does't exist yet.
    	}
 
    	if(checkDB != null){
 
    		checkDB.close();
 
    	}
 
    	return checkDB != null ? true : false;
    }
	
	private void copyDataBase() throws IOException{
		 
    	//Open your local db as the input stream
    	InputStream myInput = _Context.getAssets().open("database/"+DATABASE_NAME);
 
    	// Path to the just created empty db
    	String outFileName = DATABASE_PATH + DATABASE_NAME;
 
    	//Open the empty db as the output stream
    	OutputStream myOutput = new FileOutputStream(outFileName);
 
    	//transfer bytes from the inputfile to the outputfile
    	byte[] buffer = new byte[1024];
    	int length;
    	while ((length = myInput.read(buffer))>0){
    		myOutput.write(buffer, 0, length);
    	}
 
    	//Close the streams
    	myOutput.flush();
    	myOutput.close();
    	myInput.close();
 
    }
	
	public void openDataBase() throws SQLException{
		 
    	//Open the database
        String myPath = DATABASE_PATH + DATABASE_NAME;
    	db = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READWRITE);

    }

}
